Toothbrush



FIG. 1 is a side elevational view of a toothbrush, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view of a second embodiment of a toothbrush;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof. 

The ornamental design for toothbrush, as shown and described. 